Resistor



RESISTOR Filed March 12, 1936 Inventor: Claude A. Ja (gel? Patented Jan. 25, was 2,106,604

- uN-rrfaosTATEs' TPATENTJQFFICE Claude A. Jagger. Schenectady, N, Y., assignor to General Electric Company, a corporation of NewYork Application March 12, 1936, Serial No. 68,412

2 Claims. (Cl. 201-67) My invention relates to resistors and particuthe flange thereof toward the tube. For coniarly to resistors of the type in which a resistvenience in holding the eyelet in position on the ance conductor is supported on an insulating lead until the coating is applied and becomes member, the memberand conductor being sub hard one may pinch the sides thereof against 5 sequently coated with a protective insulating mathe lead. With the reinforcing member in place terial. on each of the connection leads the entire as- An insulating material commonly employed in sembly is given a coating of a suitable protective the past for coating resistors of this type is insulating material such, for example, as vitrevitreous enamel which is baked on after being ous enamel which is represented at 6 and which 10 applied to the resistor. Diiiiculty has been ex after being baked forms a hard heat resisting 10 perienced with resistors thus coated due to the covering. In consistency the material employed tendency of the enamel to break away at the for the coating should be somewhat thick so as points where the connection leads pass through to completely cover not only the tube and the it when the leads are flexed. Flexing of the resistance wire but also the eyelets which, as leads not only has caused the enamel to break shown in Fig. 2, thereby become firmly embedded 15 away around them but also has resulted in the in the material. breaking of the leads themselves or of some of While I have mentioned the use of vitreous the strands thereof, where stranded material is enamel as one example of a suitable material for used, due to a repeated sharp bending of the the protective coating it will be understood that lead over the edge of thebroken enamel. It is .my invention is not restricted to the use of such 0 the object of my invention to provide an immaterial but is applicable to the use of a wide proved resistor construction by which the breakvariety of organic or inorganic compounds and ing away of the insulation coating around the cements. Furthermore the reinforcing member connection leads is avoided. By thus preventing I need not necessarily be inthe form of an eyelet 5 the breaking awayof the coating around the but may simply comprise a sleeve. Moreover it leads the leads themselves are less liable to be may be a split sleeve or a split eyelet which may broken by the repeated flexing thereof. be placed over the lead and the sides clamped My invention will be better understood from together thereon. the following description taken in connection By the use of such a reinforcing member I am with the accompanying drawing, and its scope able to avoid the difliculties previously experi- 30 will be pointed out in the appended claims. enced with the cracking off of the coating and Referring to the drawing, Fig. 1 is a side view obtain the additional benefit of lessening the liaof a resistor illustrating an embodiment of my bility of breaking the lead, for the same is firmly invention with portions ofthe protective coating supported by the reinforcing member which is removed, and Fig. 2 is an enlarged detail thereof. itself surrounded by and embedded in the mate- The resistor which I have chosen to show to rial forming the coating. I prefer to employ an illustrate my invention comprises the porcelain ordinary metal eyelet as the reinforcing member tube I upon the outer surface of which is wound for such in addition to its cheapness is provided the resistance wire 2 in the form ofa helix. At with an integral flange which by being securely the ends of the porcelain tube are the connection embedded in the coating material firmly supports. 40 leads 3 to which the two ends of the resistance the tubular portion of the eyelet against bending wire are connected, each lead being shown as forces due to a flexing of the lead which might comprising a stranded cable which is passed otherwise crack the coating. around the tube with the ends thereof twisted I havechosen the particular embodiment detogether. In addition to the two connection leads scribed above as illustrative of my invention and 45 3 I have shown the resistor provided with several it will be apparent that various modifications may intermediate connection leads or taps l which are be made without departing from the spirit and formed in a similar manner to leads 3 and are scope of my invention, which modifications I aim connected with the resistance wire where the to cover by the appended claims.

latter crosses the connection lead. What I claim as new and desire to secure by 50 After the leads 3 and! are secured in place Letters Patent of the United States is: J on the tube I app y t e ead a reinforcing 1. A resistor comprising an insulating membe member Shown at such a member a resistance conductor wound around said memtrated as comp ng a small metal eyelet which her and provided with a flexible connection lead,

56 is t r a d 0n the lead and 1S sed with having a portion extending outwardly from said tion or the lead bavina an annular flange adiacentsaid memberandanenameleoatingonthe insulation member, the conductor and the tubular member.

. 2. A reaistoreompriaing an insulating member, a resistance conductor wound around said member, a. flexible connection lead secured to said 2,1 ,099 member, a tubular member mrrounding said or- 

